I am posting it here in order to add some more information.
Starting by car from Drobeta Turnu Severin, you can follow E70 towards Timisoara.
After 15 km you can stop at Iron Gates 1 Hydroelectric Power Plant (HPP), in order to visit its museum. After chronologically arranged artifacts from the area, starting stone age, continuing with bronze, iron, Roman period, and Otoman/Turkish one, you will have a visual description of the construction and the hydro power units of the Romanian side of the HPP. You will also have a glimpse of the machine hall (approx. 220 m long, 25 m tall), descending by an elevator.
|Iron Gates 1, dam and hydroelectric power plant|
After driving 5 km, you will see a road sign to the right, indicating 1 km to Vodita Monastery. Worth a visit!
Continuing 5 more km on E70 you will reach Orsova (now you will leave E70, continuing on DN57), the city rebuilt after the level of the lake raised 30 meters! You will enjoy a walk on the Danube's shore, and in the evening take a break near the ship yard or the train station in order to take some photos of the city lights reflected on the water. In Orsova you can rent a ship and take a cruise on the Danube!
Before leaving Orsova towards Eselnita, go to St. Ana Monastery.
|Orsova - Dragalina Park, and a cruise ship in background|
So you are about to leave Orsova, and after 15 km you will reach Mraconia bay, the place where a sculpture of Decebal is carved into the mountain.
|Decebalus Rex - Dragan fecit|
I think that you've had many stops and you are already hungry or at least thirsty, so continue 3 more km to Pensiunea Melba, located on the shore of Dubova bay. "Papanasii" (home made donuts) are my favorite desert there!
|Pensiunea Melba: Reflections first...|
Delicious! Siting at the table, enjoying your meal... can you see where the Danube is entering the gulf? There is its narrowest and its deepest point!
|Dubova bay (up and down)|
Well, this is a 100 km tour, and enough places to visit for a day!